Update app.py

app.py

@@ -147,7 +147,7 @@ def GenerateMIDI(progress=gr.Progress()):
     while itrack < len(opus):
         for event in opus[itrack]:
             if event[0] == 'note_on' or event[0] == 'note_off': 
-                output1.append(o)
+                output1.append(event)
         itrack += 1
         
     audio = synthesis([500, output1], 'SGM-v2.01-YamahaGrand-Guit-Bass-v2.7.sf2')